It's not recommended. What you describe requires placing the file in a shared folder and opening the file directly. That creates a situation where there is a risk of corrupting the file should two users try to open the file at the same time. It can also open the door to corruption if you make design changes to the file and there is a network glitch when saving those changes.
Answered my question ON FM site. Thanks
To enable a FileMaker Pro for FileMaker Network sharing it must be opened in FileMaker Pro. Once open, you must configure the network access for the in the FILEMAKER NETWORK SETTINGS dialog box. The FILEMAKER NETWORK SETTINGS dialog box is where you enable, disable, and modify network access to any that is currently opened in FileMaker Pro. You can get to this dialog box by: